The present investigation has as title public transport modernization and urban problems in Cartagena which alludes to the changes and transformation that Cartagena and the country in general experienced during the period 1914 to 1939. In where Cartagena arrived to progress thanks to the first mechanized means of transport as it was the Railroad of Cartagena to calm that was characterized a symbol of progress for the society of Cartagena in the middle of the XX century.